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Title: Pulse-burst laser systems for fast Thomson scattering (invited)

Abstract

Two standard commercial flashlamp-pumped Nd:YAG (YAG denotes yttrium aluminum garnet) lasers have been upgraded to ''pulse-burst'' capability. Each laser produces a burst of up to 15 2 J Q-switched pulses (1064 nm) at repetition rates of 1-12.5 kHz. Variable pulse-width drive (0.15-0.39 ms) of the flashlamps is accomplished by insulated gate bipolar transistor (IGBT) switching of electrolytic capacitor banks. Direct control of the laser Pockels cell drive enables optimal pulse energy extraction, and up to four 2 J laser pulses during one flashlamp pulse. These lasers are used in the Thomson scattering plasma diagnostic system on the MST reversed-field pinch to record the dynamic evolution of the electron temperature profile and temperature fluctuations. To further these investigations, a custom pulse-burst laser system with a maximum pulse repetition rate of 250 kHz is now being commissioned.

Authors:
 [1];  [2]; ; ;  [3]; ; ; ; ; ; ;  [1]
  1. Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706 (United States)
  2. (United States)
  3. Physical Sciences Laboratory, University of Wisconsin-Madison, 3725 Schneider Drive, Stoughton, Wisconsin 53589 (United States)
Publication Date:
OSTI Identifier:
22058668
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 81; Journal Issue: 10; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALUMINIUM; CAPACITORS; CONTROL; ELECTRON TEMPERATURE; FLASH TUBES; GARNETS; KHZ RANGE; MST DEVICE; NEODYMIUM LASERS; POCKELS CELL; PULSES; Q-SWITCHING; REVERSE-FIELD PINCH; THOMSON SCATTERING; TRANSISTORS; YTTRIUM

Citation Formats

Den Hartog, D. J., Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, Madison, Wisconsin 53706, Ambuel, J. R., Holly, D. J., Robl, P. E., Borchardt, M. T., Falkowski, A. F., Harris, W. S., Parke, E., Reusch, J. A., Stephens, H. D., and Yang, Y. M. Pulse-burst laser systems for fast Thomson scattering (invited). United States: N. p., 2010. Web. doi:10.1063/1.3475723.
Den Hartog, D. J., Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, Madison, Wisconsin 53706, Ambuel, J. R., Holly, D. J., Robl, P. E., Borchardt, M. T., Falkowski, A. F., Harris, W. S., Parke, E., Reusch, J. A., Stephens, H. D., & Yang, Y. M. Pulse-burst laser systems for fast Thomson scattering (invited). United States. doi:10.1063/1.3475723.
Den Hartog, D. J., Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, Madison, Wisconsin 53706, Ambuel, J. R., Holly, D. J., Robl, P. E., Borchardt, M. T., Falkowski, A. F., Harris, W. S., Parke, E., Reusch, J. A., Stephens, H. D., and Yang, Y. M. Fri . "Pulse-burst laser systems for fast Thomson scattering (invited)". United States. doi:10.1063/1.3475723.
@article{osti_22058668,
title = {Pulse-burst laser systems for fast Thomson scattering (invited)},
author = {Den Hartog, D. J. and Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, Madison, Wisconsin 53706 and Ambuel, J. R. and Holly, D. J. and Robl, P. E. and Borchardt, M. T. and Falkowski, A. F. and Harris, W. S. and Parke, E. and Reusch, J. A. and Stephens, H. D. and Yang, Y. M.},
abstractNote = {Two standard commercial flashlamp-pumped Nd:YAG (YAG denotes yttrium aluminum garnet) lasers have been upgraded to ''pulse-burst'' capability. Each laser produces a burst of up to 15 2 J Q-switched pulses (1064 nm) at repetition rates of 1-12.5 kHz. Variable pulse-width drive (0.15-0.39 ms) of the flashlamps is accomplished by insulated gate bipolar transistor (IGBT) switching of electrolytic capacitor banks. Direct control of the laser Pockels cell drive enables optimal pulse energy extraction, and up to four 2 J laser pulses during one flashlamp pulse. These lasers are used in the Thomson scattering plasma diagnostic system on the MST reversed-field pinch to record the dynamic evolution of the electron temperature profile and temperature fluctuations. To further these investigations, a custom pulse-burst laser system with a maximum pulse repetition rate of 250 kHz is now being commissioned.},
doi = {10.1063/1.3475723},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 81,
place = {United States},
year = {2010},
month = {10}
}